[LinuxPPS] Performance of 2.6.23.12

[Udo van den Heuvel]

Heiko Gerstung wrote:
> After looking at my ntpq -p stats for a while I see that PPS performance 
> is not acceptable so far. I see an offset of more than 5 ms between my 
> GPS string and the Atom driver. Additionally the jitter of the Atom PPS 
> seems to be very high (more than 2ms). The same hardware configuration 
> works fine with 2.6.15.1 and PPSKit Light from U.Windl.
> 
> I would be grateful for hints how I can fine tune this and where to look 
> at. Is there a kernel config option I should check?

There is some timing-related options.
I don't know them all.
But I'd say the tickless option is not good.

A complete list for timing-related tuning would be very welcome!